PARSIPPANY – Republican Gov. Chris Christie is refusing to comment on his New York Democratic counterpart’s recent troubles or their impact on the Republican candidate trying to unseat him.

Christie swatted back questions from reporters Friday on allegations New York Gov. Andrew Cuomo improperly interfered with a corruption panel he convened.

“I don’t comment on other people’s investigations,” Christie said.

The New York Times reported this week that the Manhattan U.S. attorney has threatened to investigate Cuomo for obstruction of justice or witness tampering for allegedly asking members of the Moreland Commission on Public Corruption to speak out about their work. The newspaper previously reported Cuomo’s administration had interfered with the commission’s work.

But Christie refused to comment on the potential impact on the New York gubernatorial race.

“I’m not commenting on criminal investigations that are ongoing. I’m just not. So stop asking,” he said.

He said he hated it when politicians weighed in on the work he was doing when he was a federal prosecutor and had no intention of repeating their mistakes.

“It was irresponsible for them to do it to me, and I’m not joining in the irresponsibility no matter how many times you ask,” he said.

Republican challenger Rob Astorino has called the allegations a game-changer in his bid to unseat Cuomo. But Christie, who chairs the Republican Governors Association, reiterated the comments he made last month that he has no plans to help campaign for Astorino because he has no chance to win.

“I really can’t comment on Rob Astorino any longer,” he said. “I mean the fact is he’s down 37 points in the polls. I was just acknowledging what you all have acknowledged in what you’ve written. I wish him the best of luck.”

A reporter later asked whether that meant Christie, who had proved to be a fundraising powerhouse, doesn’t “have the juice to make that a closer race?”

“No, no, I don’t,” he said. “I don’t have the juice to take a 37-point race and make it a competitive one. You know who has the juice to do that? The candidate. And at the end of the day, candidates are responsible for their races.”